Andrea Petkovic defeated Jelena Ostapenko 7-5 6-4 in the LAT vs GER round robin on hard. The upset overturned the form book — Jelena Ostapenko came in leading the head-to-head 2–0. Andrea Petkovic claimed a first win over Jelena Ostapenko in three meetings, narrowing the head-to-head to 2–1.
Petkovic A. took it in straight sets.
Petkovic A. and Ostapenko J. faced 5 of the same opponents in the last 12 months. Petkovic A. went 1–4 (20%) against them, Ostapenko J. 2–4 (33%). Results against comparable opponents are close (0 : 0 better-results split).
Andrea Petkovic beat Jelena Ostapenko 7-5 6-4. Umpiry, "Andrea Petkovic vs Jelena Ostapenko — LAT vs GER Round Robin", https://umpiry.com/match/2019-04-19/ostapenko-vs-petkovic-lat-vs-ger-rr?utm_source=cite (as of 19 April 2019).